Natural Estrolin Complextm; 16 natural estrogenic herbs and vitamins, which are natural antiandrogens. Estrolintm is a transdermal complex that helps stop the formation of Dihydrotestosterone (DHT), the major cause of male and female hair loss. DHT is responsible for 90% of excessive hair loss experienced by men & women. DHT occurs when testosterone and the enzyme 5-Alpha Reductase react together. Estrogen and progesterone are antiandrogens, which react with the androgen hormones, interfering with the formation of DHT. DHT is a powerful hormone responsible for excessive hair loss and the development of masculine characteristics in women, such as facial hair growth, thinning hair, & dry skin.